Table 1. The pore sizes of the prepared silica (S1) and sylopute were 2.2 nm and 16.8 nm, respectively. The specific surface area of the mesoporous silica was 1574 m2 /g, which was much larger than that of sylopute (SBET = 331 m2 /g). To prepare macroporous silica (S2 and S3), PS nanoparticles were used as a template. SEM photos and particle size distributions